Balancer DeFi Hack: An In-Depth Analysis of Recurring Losses

Tuesday Nov 4 2025 03:10

Duration

2 min

  1. 1. Balancer DeFi Hack: An In-Depth Analysis of Recurring Losses

  2. 1.1 A History of Attacks

  3. 1.2 Technical Analysis of the Latest Attack

  4. 1.3 Lessons Learned

  5. 1.4 Implications for the DeFi Industry

Balancer DeFi Hack: An In-Depth Analysis of Recurring Losses

Amidst a volatile cryptocurrency market, the veteran DeFi protocol Balancer has suffered a significant blow. On November 3rd, on-chain data revealed a suspected hack, leading to the transfer of approximately $70.9 million in assets to new wallets, including 6,850 osETH, 6,590 WETH, and 4,260 wstETH. Lookonchain later reported that total losses had exceeded $116.6 million. The Balancer team acknowledged the incident, stating they were investigating the potential vulnerability with high priority. They offered a 20% "white hat" bounty for the return of the stolen assets within 48 hours. For seasoned DeFi users, a "Balancer hack" is not a novel occurrence. In fact, the protocol has experienced six security incidents in five years, with a hack occurring almost annually.

A History of Attacks

* **June 2020: Deflationary Token Vulnerability:** Approximately $520,000 in losses. * **March 2023: Euler Incident:** Approximately $11.9 million in losses. * **August 2023: Balancer V2 Precision Vulnerability:** Approximately $2.1 million in losses. * **September 2023: DNS Hijacking Attack:** Approximately $240,000 in losses. * **June 2024: Velocore Hack:** Approximately $6.8 million in losses. * **November 2025: Latest Attack:** Losses exceeding $100 million.

Technical Analysis of the Latest Attack

Preliminary analysis suggests a vulnerability in the `manageUserBalance` function within Balancer V2, specifically in the access control checks. The system appears to have failed to properly verify that the caller was the actual owner of the account when checking withdrawal permissions. This allowed attackers to impersonate any account and withdraw internal balances.

Lessons Learned

This "history of hacks" reveals inherent weaknesses in DeFi protocols. The complexity of Balancer's design, allowing for eight tokens with custom weights in a single pool, significantly increases the attack surface. Additionally, Balancer's reliance on rapid iteration and the accumulation of "technical debt" may have contributed to these issues.

Implications for the DeFi Industry

Balancer is just one example of the inherent risks in DeFi. The complexity and composability of these protocols can lead to unforeseen "black swan events." While DeFi represents a novel social experiment, participation comes at a cost. The industry must prioritize security and robustness to ensure sustainable growth.

Risk Warning: This article represents only the author’s views and is provided for informational purposes only. It does not constitute investment advice, investment research, or a recommendation to trade, nor does it represent the stance of the Markets.com platform. When considering shares, indices, forex (foreign exchange), and commodities for trading and price predictions, remember that trading CFDs involves a significant degree of risk and may not be suitable for all investors. Leveraged products can result in capital loss. Past performance is not indicative of future results. Before trading, ensure you fully understand the risks involved and consider your investment objectives and level of experience. Trading cryptocurrency CFDs and spread bets is restricted for all UK retail clients.

Default Author Avatar

Written by:

Liam James

Asset List

View Full List
Most Traded Commodities Indices Crypto Shares Forex
Asset
Sell
Buy
Change (%)

Trade Now

Trade Now

Trade Now

Trade Now
Asset
Sell
Buy
Change (%)

Trade Now

Trade Now

Trade Now

Trade Now
Asset
Sell
Buy
Change (%)

Trade Now

Trade Now

Trade Now

Trade Now
Asset
Sell
Buy
Change (%)

Trade Now

Trade Now

Trade Now

Trade Now
Asset
Sell
Buy
Change (%)

Trade Now

Trade Now

Trade Now

Trade Now
Asset
Sell
Buy
Change (%)

Trade Now

Trade Now

Trade Now

Trade Now

Latest

View all

Wednesday, 6 May 2026

Duration

3 min

Gold Price Today, May 07: XAU/USD Soars 2.73% to Record $4,685 Amid Market Rally

Tuesday, 5 May 2026

Duration

7 min

Forex Market Today: USD/JPY Surges Above 150 as Dollar Strength Returns Amid Fed Rate Outlook

Tuesday, 5 May 2026

Duration

6 min

Q1 2026 Earnings to Watch Today: Coca-Cola (KO) Set to Report Before Market Open

Latest news

Friday, 8 May 2026

Indices

India's Tech Boom: India’s Offshore Tech Hubs Near 2030 Milestone in FY26

Friday, 8 May 2026

Indices

Gold Price Today, May 09: Gold (XAUUSD) at $4,720 Faces Correction Risk After 250% Rally as Oil Leads Markets

Thursday, 7 May 2026

Indices

Tata Gold ETF Rides XAUUSD Breakout as Middle East Developments Shake Markets

Thursday, 7 May 2026

Indices

Gold Price Today, May 08: XAUUSD Surge to $4,753 on Easing Oil and Inflation Signals

Wednesday, 6 May 2026

Indices

Crypto Market News Today: Dogecoin DOGEUSD Surges Past $0.115 as Meme Coin Momentum Builds in 2026

Wednesday, 6 May 2026

Indices

Gold Price Today, May 07: XAU/USD Soars 2.73% to Record $4,685 Amid Market Rally

Tuesday, 5 May 2026

Indices

Forex Market Today: USD/JPY Surges Above 150 as Dollar Strength Returns Amid Fed Rate Outlook

Tuesday, 5 May 2026

Indices

Q1 2026 Earnings to Watch Today: Coca-Cola (KO) Set to Report Before Market Open

Tuesday, 5 May 2026

Indices

Gold Price Today, May 06: XAU/USD Hits Fresh Highs Above $4,600 as Safe-Haven Demand Surges Amid Global Uncertainty

Wednesday, 29 April 2026

Indices

Commodity Market Today: UAE to Leave OPEC After Nearly 60 Years in Major Blow to Oil Cartel

See all news